SDR-18 | 18" 1,200 Watt Max Power Car Subwoofer

135 Reviews

Current Price:$149.99
Sale Price:


Coil Configuration
The Skar Audio SDR-18 D2 subwoofer was designed to redefine the term "daily" subwoofer, both in terms of power output and acoustic responsiveness across the entire low end frequency range. The engineering considerations that went into developing this 18-inch subwoofer are extensive, and contribute to why the SDR series has continued to be one of the most popular subwoofer lines we have ever released.
Featuring a 2.5" 4-layer high temperature copper voice coil, the SDR-18 can operate at peak performance for hours on end with the peace of mind knowing that it can handle the brutality. Combine that with the top-tier, high flux ferrite motor of this driver, and it is by no surprise that this subwoofer can reproduce low end bass frequencies with authority. Furthermore, we integrated a unique red nomex spider suspension system into the design that utilizes the perfect blend of stiffness and flexibility. The aforementioned components of the SDR-18 as well as its advanced air flow cooling design, are what ultimately allow for the incredible responsiveness & power handling of this subwoofer.
Product Info
SDR-18 D2
General Specifications
Car Subwoofer
Cone Type
Competition Grade Pressed Paper Cone
RMS Power
600 Watts
Peak Power
1200 Watts
Surround Type
High Roll Foam Surround
Subwoofer Size
Voice Coil Size
Magnet Slug Count
Voice Coil Layers
Voice Coil Material
Copper (Pure Copper)
Voice Coil Impedance
Dual 2 Ω
T/S Parameters
17.11 n/a
24 Hz
Dual 2 Ω
1164.1 cm2
0.107 mm/N
413.0 gr
206.0 L
13.5 mm (one-way)
87.3 dB
Recommended Enclosure Specifications
Enclosure Disclaimer
Enclosure recommendations above do not include subwoofer, bracing, and port displacement
Recommended Port Area
64.75 in²
Recommended Ported Volume
4.60 ft³
Recommended Sealed Volume
2.75 ft³
Recommended Tuning Frequency
32 Hz

Subwoofer Measurements
Total Height
Mounting Depth
Magnet Diameter
Outside Diameter

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Customer Reviews


Based on 135 reviews

  • Toyota REX Slamming
    Reviewed on 1/1/2021 by William
    Bought two of these 18” subs to give them a try. I’ve been very dedicated for over twenty years to other brands. I thought I would buy some middle of the road subs from soar and se
  • 25,000 Watt Home Theater ULF Monsters!!
    Reviewed on 5/29/2020 by David
    Verified Buyer
    I'm running 6 of these (along with 6 15s) in my 26,000 watt theater and I simply can not speak to how profound these drivers are! They simply gobble up the wattage and deliver bass
  • My First Build And Love Skar Audio
    Reviewed on 5/9/2019 by Jp
    So this is my first build ever. I did all the work myself. Took me about 2 months. Did a custom install with the skar rp1500 with a led fan in the side compartment of my tahoe. Bui
  • 18'
    Reviewed on 4/8/2021 by Emile
    Verified Buyer
    I got my box looking good like putting rims on a ugly car my 18' Skyar subwoofer makes my box look sexy
  • Even In My Boat
    Reviewed on 9/6/2020 by Randy
    Verified Buyer
    No flexn on the water:) Added a set of SKAR TX69. Going to put 1 8" sub as well
  • Great Sub For Price
    Reviewed on 7/1/2020 by JIm
    Verified Buyer
    I used this woofer to replace a round vintage Kicker 15" Solobaric 4 ohm sub woofer. Solobarics have small sealed enclosures (1.5 c.f.). The Solobaric has nice Deep bass depending
  • Great Sub 3 Different Series Sub I’ve Had And Best One So Far
    Reviewed on 4/11/2020 by Jose
    Great sub so far impressed with how loud and low it gets. Box size is 5.4 cf in a trans am lol yes trans am amp is neo dB drive 1500.1
  • Amazing
    Reviewed on 12/20/2018 by Kevin
    Verified Buyer
    Extremely satisfied with these subs. You won’t find a better quality sub for the price.
  • 18” Subwoofer For Home Audio
    Reviewed on 2/13/2022 by Chris
    Verified Buyer
    Made myself a sub for my surround sound system…it’s just ridiculous!!!!!!
    Reviewed on 1/25/2022 by jesse
    Verified Buyer
    Purchased a complete 18" setup w/box ,speaker and amp. And for the price it was the best for the quality it was even better. I also purchases a 12" kit for my nephew. Awesome. Aft
  • These Bad Boys Slap!!!
    Reviewed on 12/1/2020 by Hustlinhev
    Replace 4 12's on same power and Its like night and day.
  • Just Out 4 In My Suburban
    Reviewed on 3/16/2020 by Adam
    Verified Buyer
    Sound great so far. Time will tell now how they hold up. Very happy with them at this point
  • Awesome
    Reviewed on 1/12/2022 by kwincy
    Bought 2 18s SDR series. Breakin Em In one by one on a 1200 watt stereo system.
  • Wow
    Reviewed on 3/27/2021 by Henry
    Ordered sdr 18 and rp800.1 and got delivered in 2 days. Made a box and got everything wired and it sounds crazy for just a 600 watt sub. First skar purchase will not be the last go
  • ...
    Reviewed on 2/2/2021 by Robert
    Verified Buyer
    Haven't pushed it to it's potential but it sounds DEEP.......I made this in 45min and the enclosure flexed too much to bring out the sound... I have more pics that show the process
  • Oddly Satisfying
    Reviewed on 1/3/2021 by Customer
    This is more of an edit to a previous review but it wouldn't let me edit. FINALLY got around to getting about 3/4 finished with the infinite baffle setup in my Prelude and even wit
  • Awesome Bass
    Reviewed on 8/16/2020 by Hunter
    Verified Buyer
    Put a pair of the SDR-18D2’s Wired down to 1 ohm in a spec’d box tunes to 33 hertz and they have my Yukon shaking apart on 1500w. For the price you can’t go wrong and won’t be disa
  • Sick
    Reviewed on 3/13/2020 by Rob
    Verified Buyer
    This sub is sick running it in a custom made 34hz ported box with a Memphis 1ohm mono block 1200w amp and it hits so hard...great sub if you are on a budget... I can’t wait to upg
  • Infinite Baffle
    Reviewed on 4/11/2019 by Larry
    Verified Buyer
    I put two of these in my car in infinite baffle and they hit hard! I can play them down to 19 hrz as well on 550rms total. 120db+ all across and people can hear you across a large
  • Misleading On Website, Subs Look Great.
    Reviewed on 3/7/2019 by Robert
    Verified Buyer
    Part of my reason for choosing Skar SDR's over CT Sounds Tropo's was on Soars website it says under voice coil "copper" but on the retail box they came shipped in it states "CCAW"